Michael Main, MD
Allergy & Immunology · San Francisco, CANPI 1649833005
Payments from drug & device makers
Across 34 payments — averaging $25.85 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AstraZeneca$289
- GSK$143
- Takeda Pharmaceuticals U.S.A., Inc.$103
- Amgen$81
- Regeneron Healthcare Solutions, Inc.$68
- Novartis$39
- plus $155 from 5 others
What the payments were for
- Food & beverage$879100%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
General payments by program year
Who reported the general payments
Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.
| Company | Payments | Total |
|---|---|---|
| AstraZeneca | 10 | $289 |
| GSK | 8 | $143 |
| Takeda Pharmaceuticals U.S.A., Inc. | 4 | $103 |
| Amgen | 3 | $81 |
| Regeneron Healthcare Solutions, Inc. | 2 | $68 |
| Novartis | 2 | $39 |
| Grifols USA, LLC | 1 | $34 |
| Octapharma USA, Inc. | 1 | $33 |
| Sanofi | 1 | $32 |
| Hospira, Inc. | 1 | $30 |
| Arcutis Biotherapeutics, Inc. | 1 | $26 |
How this compares
$879 in reported general payments places this provider in the 30th percentile of 426 allergy & immunology providers in California.
Medicare billing
What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.
Other allergy & immunology in San Francisco
- Kenneth KimLong Beach$18.5M
- Purvi MehraSan Diego$6.3M
- Bob GengSan Diego$6M
- Alexander GreinerSan Diego$4.8M
- Tonny TanusBakersfield$4.5M
- Raffi TachdjianSanta Monica$4.2M
- Vinay MehtaLaguna Niguel$3.3M
- Alan GoldsobelSan Jose$3.3M
- Steven WeinsteinHuntington Beach$3M
- James WolfeSan Jose$2.5M
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
- Identity: NPPES NPI Registry, July 2026.